ConfigTranslationDeleteForm::buildForm

public ConfigTranslationDeleteForm::buildForm(array $form, FormStateInterface $form_state, RouteMatchInterface $route_match = NULL, $plugin_id = NULL, $langcode = NULL)

public function buildForm(array $form, FormStateInterface $form_state, RouteMatchInterface $route_match = NULL, $plugin_id = NULL, $langcode = NULL) {
  /** @var \Drupal\config_translation\ConfigMapperInterface $mapper */
  $mapper = $this->configMapperManager->createInstance($plugin_id);
  $mapper->populateFromRouteMatch($route_match);

  $language = $this->languageManager->getLanguage($langcode);
  if (!$language) {
    throw new NotFoundHttpException();
  }

  $this->mapper = $mapper;
  $this->language = $language;
  return parent::buildForm($form, $form_state);
}